Implementação de um programa de controle da qualidade com um subsídio a um programa de garantia da qualidade em radioterapia com intensidade modulada

Abstract

In radiotherapy the use of highly conformation treatment techniques result from the technical and technological evolution of the last years. We can highlight the development of new dose calculation algorithms and the integration of new devices such as dynamic irradiation multilamellar collimators. It is also emphasized the possibility of acquisition of images with new tools and with a lower dose contribution to the patient. Intensive modulated radiotherapy (IMRT) is one of those techniques that has been applied worldwide in recent years. For the clinical use of this technique, which allows for dose distributions with a greater preservation of the noble organs or the administration of higher doses to the target volumes, it was necessary to consult the indications provided by the international organisms and to analyze the experiences of other working groups. This work summarizes an experience that will result in the implementation of Modulated Intensity Radiotherapy (IMRT) of the Radiotherapy Service of the Integrated Regional Oncology Center (CRIO). Procedures for the various activities were elaborated, from the initial verifications before the implementation of the IMRT technique to the daily treatment, through data acquisition, validation of this technique, positioning and immobilization of the patients, elaboration and execution of quality, QA elaboration and execution. The results obtained in all phases of the realization process showed important results and are in accordance with international tolerances. Including with the tests performed with ArcCheck, which demonstrated an important accuracy in the evaluation of mechanical and dosimetric tests in IMRT.